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Physics

Physics
How much mechanical work must be done to completely melt 1 gram of ice at 0°C ?

80 J
4.2 J
2268 J
336 J

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Physics
stars which appear single to the naked eye but are double when seen through a telescope are

novas and supernovas
binaries
quasars
asteroids

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Physics
Which of the following has the longest wavelength?

Visible radiation
Infrared radiation
X-ray radiation
Ultraviolet radiation

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Physics
At what temperature do the Fahrenheit and Celsius scales give the same reading?

0 degreees
32 degreees
-40 degreees
212 degrees

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Physics
Kirchhoff's laws are applicable to

C. circuits only
C. circuits only
C. and A.C. circuits both
None of these

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Physics
What is the reason for formation of Mirage in desert?

Refraction of light
Reflection of light
Both Refraction and Total internal reflection of light
Total internal reflection of light

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